Corning Soil Series
USDA Code: CA0117
K-Factor
0.32
Soil Erodibility Factor
Texture Class
gravelly loam
Drainage Class
well drained
About Corning
Moderately deep, well drained soils formed on older alluvial terraces from mixed volcanic and sedimentary sources. Contains a claypan subsoil.
K factor values are sourced from the USDA Natural Resources Conservation Service (NRCS) SSURGO database.
Using Corning in a RUSLE calculation
For a California construction project, use the soil K factor with rainfall erosivity, slope length and steepness, cover management, and support practice inputs. The K factor represents the soil erodibility portion of the model, so selecting the soil series that matches the site is important for defensible stormwater documentation.
In a SWPPP workflow, the practical question is not just what soil type is mapped near the project. It is whether the mapped series, K factor, and drainage assumptions match the site evidence well enough to support the RUSLE or RUSLE2 calculation.
California Distribution
Extensive in the northern Sacramento Valley in Tehama, Shasta, and Butte counties. The red color comes from iron oxide accumulation.
Counties Where Found
Corning soil FAQ
What is the K factor for Corning soil?
Corning has a listed K factor of 0.32 in the Rapid RUSLE soil directory. Confirm final values against project specific soil survey data before submitting permit documents.
Where is Corning soil found in California?
Corning is mapped in Butte, Shasta, Tehama. County mapping is based on available soil series data and should be verified for the exact project location.
How is Corning used in RUSLE erosion calculations?
Use the Corning K factor as the soil erodibility input in RUSLE or RUSLE2, along with rainfall, slope, cover, and support practice factors for the site.
Calculate erosion risk with Corning soil data
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